Slip-sheeter



B. FERRAR SLIP SHEETER July 4, 1933.

3 Sheets-Sheet l INVNTOR flVI Q/ C QM BY I AT TORNEYS Filed Aug. 26, 1930 July 4, 1933. FERRAR 1,916,723

SLIP SHEETER 3 Sheets-Sheet 2 Filed Aug. 26, 1930 BY iTT bR N $y July 4, 1933. B. FERRAR 1,916,723

SLIP SHEETER Filed Aug. 26, 1930 3 Sheets-Sheet 3 INVENTOR sition of rest, toithe lowermostofa support 19. These bearing plates are located at the r 30 ejection, and Figure .10 is a view alsosimilar tray at the other end thereof.

Patent dJuly4y193 A 1,916,723

- UNITEDSTATES AT OFFICE I Application filed august 26,1930. Serial No.,477,848. A I s,

This invention relates to stencilduplicators the tray 16, the outer end of the arm 20 beand has particular reference to attachments ing provided with an upwardly curved en therefor known as slip-sheeters. 21, which is adapted to be positioned beneath The general object of the present invenand engaging the transverse tie-rod 22 of the 5 tion is to provide an attachment of the charduplicator. WVhen the arm 20 is positioned, 55"- acter mentionedwhich is simple in constrricas shown in Fig. 2, it serves to adequately tion, inexpensive to manufacture and relisupport the slip-sheeter by reason of the fact able in operation. that it engages the base 23 of the duplicator Other objects and advantages of the invenat a point intermediate thetray 16 andthe tion will becomeapparent from the folloW- tie-rod 22.: In order that the slip-sheeter may 60 ing description, taken in connection with the be further secured to the duplicator or locked accompanying drawings in which I against displacement with respect to the Figure 1 is a plan view'of a stencil duplisame, there areprovided a pair of locking cator and of the attachment embodying this fingers or arms 25, which are pivoted to the invention; Figure 2 is a side-elevation of the side walls 16 ofthe tray and are adapted to machine anda'ttachment;,FigureSis an end be moved down into engagement with the view of the attachmentas seen from the left side frame members 11 of the duplicator, in Figures 1 and 2; Figure 4r'isa vertical secthereby exerting a thrust on the tray and. tional view taken on line 43- 1. of Figure 1 forcing the arm 20 into firm engagement with showing the relation of the oscillatory feedthe tie-rod 22 and the base 23 of the dupliing shafts to plurality of slip-sheets supcator. 1 ported thereby, Figure 5 is a transverse sec Arranged transversely of the tray 16, are tional 'view of the feeding shafts, showing a pair of bearing plates 26, which are secured the relation ofthe same, when in normal porepectively' at opposite ends to the side walls ed stack ofslip-she'ets; Figures 6 to 9, inuppermargins of the tray, so as to permitthe elusive, are views similarv to that of'Figure printed sheets, as they are ejected from the 5, and showing the relation of the shafts at duplicator, to enter thetray at one end and different stages to a slip-sheet undergoing to permit such sheets to be removed from the to that of Figure 5, and showing the relation The ends of these bearing plates are so bent of ,the slip-sheet to the shaftsimmediately as to provide a plurality of upwardly prosubsequent to its release therefrom; jecting and parallel guide fingers 27, which 6 Referring to the drawings, the numeral 10 extend longitudinally of the tray and are indicates stencil duplicator I of standard adapted to receive therebetween a plurality constructiomhaving a frame, including side of slip-sheets 28 arranged in a stacked relafraine members 11, rotatablysupported in the tion, as shown in Fig. 4. usual cylinder 12, beneath which the succes J ournalled in the bearing plates 26, are a sive sheets ofpaper to be printed upon are pair of feeding or ejector shafts 30, which successively fed from the feeding'table 13, are located directly beneath the respective the printed sheets being ejected one by; one pairs of guide fingers 27 and extend longifrom that end of the machinetolwhich the tu'dinally of the tray in'a' parallel relation'to slipsheeter 15 embodying my-invention is each other, such hafts serving-to normally adapted to be attached; 1 support the slip-sheets and to successively The slip-sheeter includes a boX-likerecepremove the lowermost of such sheets as the tacle or tray 16 having a bottom wall 17 and: successive printing operations are carriedout side walls 19, the bottomwallbeing providby the-duplicator. I Each of these shafts is, ed with a notch 1' To the bottom wall 17, is 1 milled longitudinally of its length to provide suitably attached an arm 20, whiohextends a groove 31 somewhat longer than the length :an appreciable distance beyond one-end of of the respectiveslip-sheets, the walls 32 an in Fig. 3, and projects 33 of such grooves serving, respectively, as ledges, for receiving the slip-sheet about to be ejected, and as abutments for removing-or ejecting such sheet from the stack. As to the abutments 33, it will be noted that they are radial with respectto the respective shafts, and that-each of such abutments is of a width substantially equal to the thickness of the respective slip-sheets. Concerning the ledges 32, it will be noted that they lie in planes which are off-center with regard to the re spective shafts and are, respectively, perpendicular to the abutments.

Secured to the outer ends of the shafts 30. are a pair of grooved pulleys 34 and 35, re spectively. About the shafts 30 and adjacent the pulleys 34 and 35, are disposed a pair of coilor tortional springs 34 and 35, which are anchored to the adjacent bearing plate 26 and to the respective pulleys so as to normally maintain the shafts 30 in their respective positions shown in Fig. 4. The pulley 34 is provided on its outer face with a pair of bosses 37 and 38, which carry set screws 39, and are formed with openings 40 leading. into thev peripheral groove of the pulley between the side flanges thereof. The pulley 35 is similarly pro'videdwith a boss 42, carrying a set screw 43, and formed with an opening 44, leading into the peripheral groove of the pulley betweenthe side flanges thereof.

A crank arm is secured to the outer end of a shaft 46, which is journalled in the side frame members 11 of the duplicator and is rotated through a train of gears, not shown, operatively connected with the cylinder 12 in the usual manner. This crank armis pro vided at its outer end with a pin or'lug 47, adapted to detachably receive the hooked end. of a connector link 48, the opposite end of which link is secured to a flexible cable 50. This cable passes over a guide roller 51, ournalled in a bracket 51, which is secured to one ofthe side walls 19 of the tray 16. From the guide roller 51, the cable passes about the pulley 34 in a clockwise direction, as viewed in F ig. 3, and is secured to that pulley bythe set screw 39 of the boss 37, into the passage 40 of which the end of the cable projects. Extending from the pulley 34 to the pulley 35, is a flexible cable 53, one end of which projects from the groove of the pulley intothe opening 40. of the boss 38, and the. other end of which is passed about the pulley 35 in a counterclock-wise direction, as viewed from the groove thereof 1nto the opening 44 ofthe boss 42 where it is anchored by the set screw 43.. I 1

Inorder to prevent the sheets of paper, as they are-ejected from the duplicator, from being thrown under their own momentum through the tray 16, there is provided an abutment 56 at the rear of the tray. This abutment is substantially V-shaped, inverted, and is formedintermediate the ends of a v the tray side walls 19 of the tray near the bottom thereof. The spring 60 issufficiently strong to hold the abutment 56 in its position shown in Figs. 1 to 3, in whichposition it serves to limit the throw of the sheets as they enter 16 from the duplicator, but is of such a naturethat it permits the abutment to move rearwardly in advance of the sheets as they'are withdrawn from the'tray, when they are gripped by ones hand, thezfingers and thumb of whichare readily accommodated, respectively, by the notch 18 formed in the bottom 19 of the tray and by the inverted V-shaped abutment'56.

'In operation, the sheets to be printed upon cator under the cylinder 12 thereof and are ejected oneby one in printed form from the 1 machine into the tray 16 of the slip-sheeter. As the drum 12 is rotated, the shaft 46 carrying the crank arm 45 is rotated in a properly timed relation to cause the slip? sheets to'be successively removed from the bottom of the stack and forcibly impelled downwardly onto the printed sheets by the shafts 30 as such printedsheets are successively introduced into the tray 16 from the duplicator. through from its.position,shown in Fig. 2, carries with it the cable50, which, by reason of its connection withthe pulley34, causes that pulley-together 30-to rotate in a counter-clockwise direction, as viewed in Fig. 3, the length of the arm being such with respect to the diameter of the pulley as to effect rotation of that pulley and that shaft through an arc of ap proximately 180, as will appearfrom Figs. 5 to 10. As thepulley 34 is thus rotated, rotation of the pulley 35 is effected in a clockwise direction, as viewed in Fig. 3, through the cable 53 which is connected to 34 and to the pulley 35, the extent of rota tion of the pulley 35, together with its shaft 30, being the same with its shaft 30. -D crank arm 45 moves 180 to its position springs 34" and 35 return them to their normal positions, shown in Fig. 5. In rotating the shafts their position shown in Fig. tion shown in Fig. sheet of the stack normall shafts-30, as shown in Fig. sition on the ledges as such ledges move uring such time as the through the remaining 5 to their posimarginsof the slip-sheet. Upon further 130,-

Thecrank arm 45in moving shown in Fig. 2, the 3 act on the shafts .30 to 30 from 9, the lowermost slipwith its shaft I lit as the pulley 34, together tation of the shafts 30, the abutments 33 engage the longitudinal edges of the slip-sheet, as shown in Fig. 7, and thereafter move such sheet downwardly, as shown in Fig. 8, from p the remaining slip-sheets, which are retained supported by the shafts in the manner also shown in Fig. 8. As the slip-sheet is thus moved, it is caused to buckle downwardly along its longitudinal medial line, such buckling being eflfected by reason of the fact that the longitudinal edges are moved closer together by the abutments 33 of the rotating shafts. In buckling the slip-sheet, a certain amount of energy is stored therein,'which energy is later utilized in a reactionary mamier to impel the sheet downwardly when released from the shafts, as will hereinafter appear.

In rotating the shafts 30 from their position shown in Fig. 8, each of the ledges 32 assumes an upwardly and inwardly inclined position with respect to the slip-sheet being ejected. As soon as the ledges 32 assume this position, the slip-sheet, due to its tendency to straighten out as a result of the energy stored therein during buckling, begins to react against the inclined ledges, and in doing so the slip-sheet slides clownwardly along the inclined ledges, as shown in Fig. 9, to a point where it is re-.

leased from the shafts and impelled forcibly on to the printed sheet last received from the duplicator by the tray 16. Following the ejection of the slip-sheet, the shafts 30 are returned to their normal positions, s iown in Fig. 5, by the springs 34 and 35, preparatory to the next cycle of operation.

Although only one form of the invention is herein shown and described, it will be understood that various changes may be made without departing from the spirit of the invention or the scope of the following claims.

hat is claimed is:

1. A slip-sheeter comprising a pair of rotatable members including sheet-supporting portions adapted to support a plurality of slipsheets in a stacked relation, and including sheet-engaging means adapted to engage the lowermost of said sheets and forcibly remove it from its supported position while the remaining sheets are supported by said supporting portions. I

2. A slip-sheeter comprising a pair of rotatable shafts each provided with a ledge adapted to normally support a plurality of slip-sheets in a stacked relation and each provided with an abutment adapted to engage the lowermost of said sheets and forcibly remove it from its supported position.

3. A slip-sheeter comprising a pair of rotatable shafts having portions adapted to nor mally support a plurality of slip-sheets in a stacked relation and having other portions adapted to engage and forcibly remove only the lowermost of said sheets and also portions adapted to move into supportingpositions beneath'the remaining sheets and support them during the removal of said lowermost sheet.

tatable shafts having portionsadapted to normally support a plurality of slip-sheets in a stacked relation and having other portions adapted to engage and forcibly remove only the lowermost of said sheets and also portions adapted to move into supporting positions beneath the remaining sheets and support them during the removal of said lowermost sheet, and means for rotating said shafts simultaneously in opposite directions.

5. A slip-sheeter comprising a pair of rotatable shafts each having a longitudinal groove, said grooves having ledges, upon which is adapted to normally rest the lowermost of a plurality of slip-sheets in stacked relation, and having abutment walls adapted to engage opposite edges of said lowermost sheet and cooperate with such sheet to forcibly remove it from its supported position,

and having peripheral portions adapted to move beneath the marginal edges of the remaining sheets to support them during the removal of said lowermost sheet.

6. A slip-sheeter comprising means for supporting a plurality of slip sheets in a stacked relation, sheet-engaging means adapted to en- Lies and comprising means for supporting a plu- I rality of slip-sheets in a stacked relation, sheet-engaging means adapted to engage opposite edges of the lowermost sheet and adapted to be moved relatively toward. each other while in engagement with said edges to effect buckling of the lowermost sheet and to forcibly and completely remove it from its supported position, and actuating means for effecting movement of said sheet-engaging means relatively toward each other.

8. In a slip-sheeter, supporting means for supporting a plurality of slip-sheets in a stacked relation, sheet-engaging means comprising a movable member adapted to engage I an edge of the lowermost slip-sheet and move that edge toward the opposite edge of such sheet whereby such sheet is buckled and energy is stored therein, means forutilizing' such stored energy to release the sheet from said sheet-engaging means'and impel it downwardly and out of contact with the re maining sheets.

In testimony whereof, I have signed this specification.

BERNARD F ERR-AR. 

